week 5 Cardiovascular System (CVS)

Question 1

The only vessels that provide direct access to nearly every cell in the body are the:

Select one:

a. arterioles.
b. capillaries.
c. arteries.
d. venules.

Answer 1

b

Question 2

Exchange of gases and nutrients occurs by diffusion between the:

Select one:

a. artery walls and tissue cells.
b. capillaries and tissue cells.
c. arterioles and tissue cells.
d. arteries and veins.

Answer 2

b

Question 3

Peripheral resistance ________.

Select one:

a. decreases with increasing length of the blood vessel
b. increases as blood vessel diameter increases
c. increases as blood viscosity increases
d. is not a major factor in blood pressure in healthy individuals

Answer 3

c

Question 4

During systemic circulation blood leaves the:

Select one:

a. right ventricle and goes directly to the aorta.
b. left ventricle and goes directly to the aorta.
c. right atrium and goes directly to the lungs.
d. right ventricle and moves to the lungs.

Answer 4

b

Question 5

Which of the following is not one of the MAIN PHYSIOLOGICAL factors influencing blood pressure?

Select one:

a. cardiac output
b. peripheral resistance
c. psychological state
d. blood volume

Answer 5

c

Question 6

The endothelium is composed of:

Select one:

a. simple columnar epithelium.
b. stratified squamous epithelium.
c. simple cuboidal epithelium.
d. simple squamous epithelium.

Answer 6

d

Question 7

The major long-term mechanism of blood pressure control is provided by the:

Select one:

a. the heart.
b. kidneys.
c. the digestive tract.
d. the lungs.

Answer 7

b

Question 8

The inferior vena cava brings blood from the lower regions of the body and empties into the:

Select one:

a. left atrium.
b. right ventricle.
c. right atrium.
d. left ventricle.

Answer 8

c

Question 9

Which of the following types of blood vessels have the thickest tunica media of all vessels?

Select one:

a. arteries
b. Veins
c. capillaries
d. vena cavae

Answer 9

a

Question 10

During pulmonary circulation blood leaves the:

Select one:

a. right atrium and goes directly to the lungs.
b. right ventricle and goes directly to the aorta.
c. left ventricle and moves to the lungs.
d. right ventricle and moves to the lungs..

Answer 10

d

Question 11

Which of the following factors does not influence heart rate?

Select one:

a. skin color
b. age
c. anxiety
d. body temperature

Answer 11

a

Question 12

The tricuspid valve is closed ________.

Select one:

a. while the ventricle is in diastole
b. when the ventricle is in systole
c. while the atrium is contracting
d. by the movement of blood from atrium to ventricle

Answer 12

b

Question 13

Which of the events below does not occur when the semilunar valves are open?

Select one:

a. Ventricles are in diastole.
b. Blood enters pulmonary arteries and the aorta.
c. AV valves are closed.
d. Ventricles are in systole.

Answer 13

a

Question 14

Select the correct statement about the heart valves.

Select one:
a. The mitral valve separates the right atrium from the right ventricle.

b. The tricuspid valve divides the left atrium from the left ventricle.
c. Aortic and pulmonary valves control the flow of blood into the heart.
d. The AV valves are supported by chordae tendineae so that regurgitation (back flow) of blood into the atria during ventricular contraction does not occur.

Answer 14

d

Question 15

Which vessel of the heart receives blood during right ventricular systole?

Select one:

a. venae cavae
b. pulmonary trunk
c. aorta
d. pulmonary veins

Answer 15

b

Question 16

The blood vessels that supply oxygen and nutrients to the cardiac muscles are called:

Select one:

a. cerebral arteries
b. renal arteries
c. coronary arteries
d. pulmonary trunk

Answer 16

c

Question 17

Which of the following is not part of the conduction system of the heart?

Select one:

a. AV node
b. bundle of His
c. AV valve
d. SA node

Answer 17

c

Question 18

The fact that the left ventricle of the heart is thicker than the right ventricle reveals that it ________.

Select one:

a. pumps a greater volume of blood
b. pumps blood against a greater resistance
c. expands the thoracic cage
d. sends blood through a smaller valve

Answer 18

b

Question 19

Normal heart sounds are caused by which of the following events?

Select one:

a. excitation of the SA node
b. closure of the heart valves
c. friction of blood against the chamber walls
d. opening and closing of the heart valves

Answer 19

b

Question 20

Which of these vessels receives blood during ventricular systole?

Select one:

a. aorta only
b. pulmonary arteries only
c. pulmonary veins only
d. both the aorta and pulmonary trunk

Answer 20

d

Question 21

Small muscle masses attached to the chordae tendineae are the ________.

Select one:

a. trabeculae carneae
b. pectinate muscles
c. papillary muscles
d. venae cavae

Answer 21

c

Question 22

To auscultate the aortic semilunar valve, you would place your stethoscope in the ________.

Select one:

a. second intercostal space to the right of the sternum
b. second intercostal space to the left of the sternum
c. fifth intercostal space inferior to the left nipple
d. fifth right intercostal space

Answer 22

a

Question 23

Lymph is prevented from flowing backwards by _______.

Select one:

a. blood pressure
b. suction from the contracting lymph nodes
c. cilia lining the lymphatic system
d. one-way valves

Answer 23

d

Question 24

The lymphatic system consists of _______.

Select one:

a. all of the plasma component of the bloodstream
b. all fluids inside the body’s cells
c. lymphatic vessels and lymphoid organs
d. all liquids in the body whether inside cells or in spaces between tissues

Answer 24

c

Question 25

Compared to skeletal muscle, cardiac muscle ________.

Select one:

a. has intercalated discs
b. lacks striations
c. has more nuclei per cell
d. cells are larger than skeletal muscle cells

Answer 25

a

Question 26

Tissue fluid in the lymphatic system is called ________.

Select one:

a. Plasma
b. Lymph
c. ICF
d. Solvent

Answer 26

b

Question 27

The left ventricular wall of the heart is thicker than the right wall in order to ________.

Select one:

a. accommodate a greater volume of blood
b. expand the thoracic cage during diastole
c. pump blood with greater pressure
d. pump blood through a smaller valve

Answer 27

c

Question 28

Lymph nodes are found in

Select one:

a. neck region
b. axilla
c. groin
d. All of Above

Answer 28

d

Question 29

Blood within the pulmonary veins returns to the ________.

Select one:

a. right atrium
b. left atrium
c. right ventricle
d. left ventricle

Answer 29

b

Question 30

The fluid that passes through the lymphatic vessels

Select one:

a. moves in a single direction toward the heart
b. flows toward the lungs
c. passes from the lymphatic vessels into the arteries
d. enters the left ventricle of the heart through the right thoracic duct

Answer 30

a